Milling jig



Sept. 7. 1926.

M. G. BERTI-0N IVIILIIJNGv JIG Filed June 20. 1923 3 Sheets-Sheet 1 M.G. BERTI-10N MILLING JIG Filed June 20. 1925 5 sheets-sheet a l sept.'7, 1926. v

M. G.v BERTHQN MILLING JIG Filed June 2o, 1923 :s sheets-sheet s 1 l imli 46 Suva/nmz Patented Sept. 7, 1926.

PATENT OFFICE.

` `MARCEL G. Basri-TON, or PRATT CITY, ALABAMA.

MILLING J IG.

`Apvp1iati0n led June 20. 1923. Serial N0. 646,539.

This invention relates to machine tools and particularly to animprovement where-A by a multiplicity of work pieces can be machinedsimultaneously, and aims to provide a construction whereby while onebatch of work is being machined, another batch can be put in place forsubsequent machining, thus effecting a saving of time. The inventionalso contemplates an arrangement whereby an even depth of cut can bemade onv the work pieces which ,is parallel with the longitudinalcontour of such work pieces,

regardless of whether the work is cylindrical, tapered or curved. y

An' yembodiment of the invention is illus-"' trated in the. accompanyingdrawings in which Fig. 1 is a planview showing a mill ing Jig and a gangof milling cutters adapted to flute the work pieces carried by the Fig.v2 is a vertical section on the staggered line 2-2 of Fig. 1; i

Fig. 3 is a vertical section on line 3 3 of Fio. 1. i

Tteferring in detail to the drawings, 10 represents a carriage or tableof a milling machine which is movable toward and away from the arbor 12of such milling machine on which is carried a multiplicity of millingcutters 14 forming in effect a single gang cutter 1 6. Secured to thetable 10 is a base 18 on which is pivotally mounted a turret 2l), whichturretis centered by means of a dowel pin 22 projecting partly into theturret and partly into the base as shown inFig.2. l Located between thebase 18 and the table 10, is an intermediate member 24 and to theunderside of tliismember is Asecured a key 26 by means offlat headmachine screws or' their equivalent. The key 26 engages the upper sidewalls 28 of a T slot 30 formed in the table 10. Asshown in Fig. 2 theintermediate member 24 is tapered and thus re# sults in supporting` thebase 18 and turret 2O in asuitably inclined position which correspondswith the taper of the work carried on the spindles supported by theturret as will hereinafter appear'.

The base 18 is secured to the table 10 by bolts 32 having headsv 34which engage the overhang 36 of the T slots 30. By loosening the clampnuts 38, the base 18 can be secured in any desired location on the tablethe 'milling as will be understood, And when the parts are loosened, theintermediate member 24 will move with the base because they are keyedtogether by means of a. key 40.

The base 18 is formed with an annular yT slot 42 which is concentricwith the dowel pin 22, and bolts 44 which pass through the turret 2Ohave heads which ride in the annular T slot 42 when the turret isrotated. The bolts 44 carry suitable clamp nuts 46 by which the turretcan be firmly clamped to the base as will be understood.

The turret 20 is formed with a pair of upstanding bearing flanges 48 inwhich are mounted a multiplicity of spindles 50. Each spindle carries agear 52 which is keyed or otherwise secured to a reduced shank 54. i

The work blanks B which are to be fluted by the gang cutter are clampedby means of -nuts 56 to studs 58 which are securedv in the ends 60. ofthe spindles. The several gears 52 carried by the spindles 50 are inmesh with one another and form a continuous train. Therefore, if onespindle on either side of the turret is turned, all of the otherspindles on that side will be turned with it. l To expedite indexing thework, I provide one of the spindles of each group with an elongatedshank 542l to which is keyed and clamped an indeXf'disc 62 having anumber of perforations 64 in the periphery thereof corresponding to thenumber of grooves or flutes to be made inthe work blanks B by cutters. Alspring pressed plunger66 carried in a bracket 68 secured to the turret20 is provided for locking the spindles in theirV indexed position. Theplunger 66 is provided with a thumb piece 70 `by which the plunger maybe withdrawn,

and the disc 62 is formed with a plurality of sockets 72 for theinsertion of arod 74 which the operator pulls to turn the severalspindles. i

In operation the table 10 is fed toward the gang cutter 16 by any usualor suitable means ordinarily employed in milling machines and similarmachine tools. This will cause the cutters 14 to simultaneously fiutethe work blanks B carried by one gang of spindles. and the tablewithdrawn, the index disc 62 will be turned one notch and thetable againmoved forward to permit theicutting of an- After the cut has beenfinished v Workingposition.

other flute or groove. *This operation Will be repeatedv until the.entire periphery of,"

each blank has been tluted.

been going on, another batch oi Work, namely the blanks B, have been"fastened to the gang of spindles 50 on the opposite side ol"V theturret. Therefore, as soon as one batch" ol' work has been tinted, theturret can bev quickly turned so as to position the'other batch oiblanksB for engagement with the Theblanks B and rB as shown in Fig. 2- aretapered,iand in' order "to secure an even depth of out parallel tothelongitudieA nal contour otlthe blank,fthe intermediate member 24V istapered kto -a corresponding angle. Itis apparent aswthus arranged the,

straight line'b., of troinone end-.oi the Z), b thereof Which definesits longitudinal contour. f i f y l In cases Where theblankus neithertapered nor curved, .but `is merely a. cylindrical piece, I ycan mountthe base y18 directfaces as Will be understood Y. i

Thile I have described with great par# ticularity the details of theembodiments of the invention illustrated, its-is not to be construed`that I am limited thereto as changes in arrangement and substitution ofequivalents may be made by those skilled in the art Without departingfrom thel invenf tion as defined inthe appended claims, That I claimis:V

. l'. A machine toolcjig comprisinga tur-fV ret rotatable on asubstantially` vertical axis, separate gangs of'r Work carryinglspindlesmounted directly4 thereon .-on f oppositel .sides of vsaid aXis,mea-ns'forclampingsaid `turret so as to hold either gangoi:l spindles and theWork pieces carried therebykin positionv to be acted on'byaV single gangof cutu` ters, and means for varying the aXial pof sition oi saidspindles with relation to the horizontal line and to suit` the contourof the Work carried by saidspindles, said turret being mounted onacarriage adapted to be moved toward and from said gang cutter.

2. A machinetooljig comprising in combination a carriage movable towardandfroin the cutters of a machine tool, a rotary.

support carrying separater gangsof "Workspindles andv arigidpmemberbetween the carriage and said rotary support Jfor vary- .a cut fof evenAdepth parallel to y Vtour of the Work carried by lthe spindles. Vhilethe operation on the blanks has i-machine tool jigcomprising incoinbination, a carriage'movable toward and :trointhecuttersmf "a"machine tool, means ycarrying a gang of work spindles and a rigid memberfor varying the angle of inclinationotsaid spindles with respect to thehorizontal'somthat the cutters Will make the .longitudinal contour ofthe Work'.

I 4c. A machine tool )igincluding separate gangs of Work-blanksupporting spindles,

yand a single pivoted member having fixed bearing portions supportingthe/,gangsv on vopposite sides of the pivot so that kthe Workblankscanfnbe ysecured* to or removed from one gang of spindles rWhilethefblanks fon another gang are being machined andmeans for varyingthelangle; of inclination of said spindles tothe horizontal.A ,so` thatthe cutblank to thet otheris` parallel with the top';V fsuriaceoi thetableV l() and as the vtable is horizontal, and moves forward in ahorizontal plane, the bottomfoi the cuti'orined A in the blankV Will ,beparallel with the Vlinef ters will make a cut'ofsubstantially'even depthapproximatelyy parallel to kthe longi-` tudinal contour` of the fvvorkblank.

5 The combination of afgang cutter with a vJig comprising al carriagemovable to- Ward andfromgsaid gang cutter, abase adgangs` of Worksupporting spindles, and a tapered membersbetween said base ,and saidcarriage for` axially positioning the spindles according tothe contour.of the VWork carried thereby. Y A

"A machine tool -jigincluding a turret,a gang of Work-'carrying spindlescarried thereon, ay gang cutter, va table movable toward and from saidcutter '.or supporting said Vturret vand spindles, a rigid means forvarying thel angular position of said spindles with respect to saidV'table so .as to secure a vcut of determined depth and of a; contourcorresponding toy the contour of the blanks carried by said spindles.

8. The combination With a gang-cutter and a table movable relatively .tothe cutter, ofspindles carried by the table for vsupportingamultiplicity of lWork blanks, and arigid tapered member for varyingtheangularity betweenthel spindles and the "table so as to secure a :cutpredetermined longitudinal contour;

9. The Combination with a gang-Cutter and a table movable relatively tothe eiittei, separate gangs ef spindles1 eaii'ed by the Jfable foilsupporting' a multiplicity of Woik blanks, and means foi' Varying tlieangulaiity between the spindles and the table so as to seeuie a eiit ofpredetermined longitudinal contour, and means Carried by said tableadapted to be turned so as to move tlie blanks eaiiied by eitliei1 gang'of spindles l0 into position to be machined by said eiittei'.

In witness whereof, I have hereunto signed my name.

MARCEL G. BERTI-ION.

